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` (No Model.)

J. S. HEATH.

A SPRING HOE. No. 281,874. Patented July 24, 1883.

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UNITED STATES PATENT OEEICE.

JAMES S. HEATH, OF BRANTFORD,V ONTARIO, CANADA, ASSIGNOR TO J. O.

VISNEB, SON & CO., OF SAME PLACE.

SPRING-HOE.

SPECIFICATION forming part of Letters Patent No. 281,874, dated July 24,1883.

Application filed February 15, 1883.

To a/ZZ whom t may concern:

Be it known that I, JAMES SAMUEL HEATH, a subject of the Queen of GreatBritain, residing at the city of Brantford, in the county of Brant, inthe Province of Ontario, Dominion of Canada, have invented certainnewand useful Improvements in Spring-Hoes, of which the following is aspecification.

The object ofthe invention is to simplify the 1o construction of thespring-hoe, and to arrange it so that the drill-hoe can be taken off andthe cultivator-tooth put in its .place without removing a single bolt ordisconnecting the liftingchain 5 and it consists in the formation and i5 arrangement of parts, as hereinafter specied.

Figure 1 is a perspective View of the springhoe complete. Fig. l is anenlarged view of the projection (l, showing the form of the notches.Fig. 2 is a detail of a drill-hoe. Fig.

2o 3 is a detail of a cultivator-tooth. Fig. 4 is an enlargedperspective detail of the lever C. Fig. 5 is an enlarged perspectivedetail of the lever O, having a' hooked end instead of the projection c.Fig. 6 is a longitudinal section of Fig. 4. Fig. 7 is a longitudinalsection of Fig. 5. B when provided with a hole to fit over theprojection c, and a stud, b, to iit into the notch formed in theprojection d. Fig. 10 is 3o a detail of the brace B when notched to fitover a iixed stud in the projection cl, and provided with a pin to fitinto the hooked end of the lever O when formed as shown in Figs. 5 and7. Fig. 1l is an enlarged detail of the cap 3 5 I and link J. y

D is a drill-hoe having on its upper and forward face a projection orlug, 7L, intended to fit within the drag-bar A. The outer or bottom edgeof the lug and the bottom of the notch 4o or gap h should be struck froma common cenj ter. cl is a proj cction situated beneath the lug h, andhaving notches cut upwardly in its lower edge, to receive the pin orstud b on the end of the brace B. The upper part of these notches is cutat such an angle that the particular notch into which the stud b may atthe time be fitting shall be at about right angles to the brace, whilethe lower part of each notch is -cut at an angle of about forty-iivedegrees 5o to its upper part.

Figs. 8 and 9 are details ofthe brace.

(No model.)

A is the dragbar, made in the usual form, except that one-half of it iscontinued beyond the point where the hoe is pivoted, and has on its enda cap, L This cap is ahollow saucerlike casting shouldered to passunderneath the drag-bar, and slotted on its upper side, so as to allow alimited motion to the link J, which is held by and pivoted on a bolt, K,passing through the drag-bar, cap, and link. To this link is connectedthe chain for attaching the hoe to the lifting-roller, thereby "enablingthe hoe to be removed without disconnecting the liftingchain, which inother machines is connected to the hoe.

K is a strap passing underneath the lug lz, up each side of thedrag-bar, and is provided with shoulders which project inwardly, so asto fit over the top edge ofthe drag-bar.

The locking-lever O, as shown in detail, is a short casting having astud or pivotpin, c, cast on each side, upon which it is pivoted to thedrag-bar. The lever G is also grooved throughout its length to receivethe lower edge ofthe brace B. One of the sides of the locking-lever iscarried upwardly beyond the main body, where it terminates in ahookformed projection, c, having an oval-shaped head on its upper end.This head is of such a size and shape that the hole in the end of thebrace B may iit over it, and by atwisting motion be made to embrace theprojection c. It will be seen by this peculiar construction that it isimpossible to disconnect the brace from the locking-lever when inworking position. At the lower end of the locking-lever are cast twocheeks, c, which are iitted with a small bolt or rivet passing throughand made fast to the same.

H is a casting bolted iirmly between the plates forming the drag-bar,and extending below it to form a support for the end of the plunger G.

S is a spiral spring supported by the rod or plunger G, which plunger isprovided with a collar and a tenon having a notch in the end. The tenonts between the cheeks c of the locking-lever C, and the notch fits overthe small bolt or rivet, and is lirmly retained in contact by thepressure caused by the expansion of the spring S.

Fig. 3 represents a cultivator-tooth provided with notched lugs d,similar to those on the drilling-hoe, with which it is interchangeable.

It will be seen from the foregoing description that by the constructionand arrangement of parts herein described certain new and importantfeatures are introduced-for instance, the rapidity and ease with whichthe drillinghoe may be replaced by the cultivator-tooth, or vice versa,which change may be effected without loosening a nut or removing asingle bolt, by simply depressing the lower end of the brace B until itspin b is clear of the notch into which it may at the time be fitting.The bottom part of the hoe or cultivator-tooth is then pulled backwardlyand upwardly till the gap h in the lug 7L is in line with the drag-barA, when the hoe or tooth may be withdrawn without any furtherdisplacement of the parts. In order to change the angle of thehoe ortooth, it is merely necessary, after liberating the pin b by depressingthe brace B, as before mentioned, to swing the hoe or tooth till thenotch corresponding with the desired angle is oppovsite to the said pinZ), when it will be carried upward, and there iirmly retained by thepressure of the spring S, acting against the lockinglever C, whichsupports the brace B.

It will'be noticed that in the construction of my locking device therelative position of the three centers of motion`viz., pin b at thelower end of the brace, projection c at upper end of locking-lever, andthe pivot of the latter-is maintained by the contact of the said bracewith the step j" in the groove of the lockinglcver, and not, as usual,by the latter resting upon the top edge of the drag-bars. This allowsthe spring to exert pressure on the lower part of the brace B, to keepthe brace in proper connection with the hoe or tooth. By having theholein the upper end of the braces made on one side of the longitudinalcenter line, the tension of the locking device may be altered by turningthebrace upside down. The position of this hole fi will be understood onreference to Figs. 8 and 9. In these figures the location of the stud bis also shown. So far in the specification I have described the lever Gas having a projection, c', to connect with the brace B, and the braceas having a stud, b, to connect with the proj ection d, formed on thehoe D or cultivator-tooth. Of course the same result will be attained byforming the lever Gas shown in Figs. 5 and 7, in which a hooked end, g,is shown as an equivalent for the projection c. Vhen the lever is madein this way, it is of course necessary to provide a stud, j, (see Fig.10,) which stud is designed to iit into the hooked end g when the edgeof the brace rests on the step j'.

lVhile I think the notches sh own in the proj ection d will be foundpreferable, the same end might be accomplished by putting a fixed studin the projection d and forming notches in the end of the brace B, asshown in Fig. l0.

NVhat I claim as my invention is- 1. In a drill-hoe or cultivator-toothpivoted to the drag-bar, the combination of a projection formed on thehoe or tooth below the pivot, and having notches formed in it to receivethe pin connecting it to the brace, each of said notches beingconstructed with different inclines, substantially as and for thepurpose specied.

2. In a drill-hoe or cultivator-tooth having a projection to fit withinthe drag-bar, and a notch formed on the top side of the said projectionto fit onto the bottom side of the pivotpin, the combination of a strapbolted or otherwise fastened to the drag-bar, and extending below thenotched projection for the purpose of holding it against the pivot-pin7as specifred.

3. In a spring-hoe, a locking-lever pivoted to the drag-bar, incombination with a brace the upper end of which is connected to thelocking-lever above its pivot, while the portion ofthe locking-leverextending below its pivot forms a support for the brace, substantiallyas and for the purpose specified.

4. In a spring hoe, substantially as described, and in combination withthe brace and plunger thereof, the lever (l, having means for connectionwith said plunger, and a hook for removably securing it to the brace, asshown.

5. In a spring-hoe, a locking-lever provided with pivot-pins to connectit to the drag-bar, and a hooked end to connect it to the brace, incombination -with a step formed on or by the top edge of thelocking-lever, for the purpose of supporting the brace between the pointwhere it connects with the lever and the point where it is attached tothe hoe.

6. In a spring-hoe, a locking-lever pivoted to the drag-bar, andremovably connected at its upper end to the hoe-brace by the hook g, incombination with a spring arranged to eX- ert an upward pressure on thelower end of the locking-lever, substantially as and for the purposespecified.

7. In a spring-hoe in which the upper end of the hoe-brace is connectedvto the lockinglever above its pivot, while the portion of thelocking-lever extending below its pivot forms a support for the brace,the combination of a hole 0r pin made in or formed upon the upper end ofthe brace at a point on one side of the longitudinal center line of thesaid brace, substantially as and for the purpose specified.

8. In combination with the drag-bar and a recessed cap supporting thesame, the links J', working loosely in said cap, and the liftingchain,as set forth.

9. The cap I, recessed as shown, and having lugs to engage the underside of the drag-bar, combined with the links J, the drag-bar, thelifting-chain, and the hoe, as set forth.

Toronto, January 24, 1883.

JAMES S. HEATH.

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